IEEE Transactions on Aerospace and Electronic Systems

Issue 3 • July 1995

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Displaying Results 1 - 25 of 37
  • Comments on "A method for improving extended Kalman filter performance for angle-only passive ranging"

    Publication Year: 1995, Page(s):1148 - 1150
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (281 KB)

    Some history of this bearings-only problem at Sperry dating from 1965 is presented. The erratic estimation problems were soon recognised and labeled the "Collapse of the Covariance Matrix Problem". A solution was soon found as a relation transformation on the covariance matrix. The angle of rotation was the difference between estimates of bearing before and after a measurement update. Based on a c... View full abstract»

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  • Multitarget detection using synthetic sampled aperture radars

    Publication Year: 1995, Page(s):1127 - 1132
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    A new multitarget detection technique using synthetic sampled aperture radar (SSAMAR) is presented. In contrast with the standard approach to multitarget detection, this technique may not require the use of phase shifting or tapering hardware. SSAMAR doubles the target pattern resolution, attenuates the sidelobes to about -27 dB, and significantly enhances the signal-to-noise ratio (SNR). Computer... View full abstract»

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  • Interacting acceleration compensation algorithm for tracking maneuvering targets

    Publication Year: 1995, Page(s):1152 - 1159
    Cited by:  Papers (19)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (612 KB)

    The two-stage Kalman estimator has been studied for state estimation in the presence of random bias and applied to the tracking of maneuvering targets by treating the target acceleration as a bias vector. Since the target acceleration is considered a bias, the first stage contains a constant velocity motion model and estimates the target position and velocity, while the second stage estimates the ... View full abstract»

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  • Performance analysis of wavefront curvature methods for range estimation of a moving source

    Publication Year: 1995, Page(s):1082 - 1103
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1304 KB)

    In numerous practical situations a large array of sensors is required, especially for improving the system ability to detect and track moving sources. However, the array performance is strongly affected by the lack of stationarity of the impinging signals. The use of a large array of sensors allow us to perform the source localization by using the wavefront curvature. The analysis of the range est... View full abstract»

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  • A necessary condition for effective performance of the multiple model adaptive estimator

    Publication Year: 1995, Page(s):1132 - 1139
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    Effective adaptive estimation for a general linear system driven by an input modeled by a randomly switching Gaussian process is considered. The performance of the multiple model adaptive estimator (MMAE) is, in some cases, unexpectedly hampered by a necessary condition not satisfied by the linear system. This key dependency for effective MMAE performance is based on a particular property of the D... View full abstract»

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  • Further comments on “Optimal sensor selection strategy for discrete-time estimators” [and reply]

    Publication Year: 1995, Page(s):1159 - 1167
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    The fundamental TPBVP usually underlying true “optimal sensor selection strategy” is revisited to obtain practical real-time mechanizations as a solution to an exclusively initial value problem View full abstract»

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  • Cycle slip performance of digitally implemented phase detectors on AWGN channel

    Publication Year: 1995, Page(s):1105 - 1110
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    Cycle slip performance of digitally implemented phase detectors on additive white Gaussian noise (AWGN) channel is investigated. The performance measure evaluated is the mean cycle slip time of a first-order phase-locked loop. An equivalent phase detector model with state-dependent loop noise is employed. It is shown that this working basis is vital to arrive at correct results. Numerical results ... View full abstract»

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  • Enhanced target detection using stereoscopic imaging radar

    Publication Year: 1995, Page(s):1139 - 1148
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (876 KB)

    An earlier correspondence reported experiments which suggested that the visibility of a target in clutter could be improved through stereoscopic viewing of high resolution radar images. Here we provide a more thorough discussion on the application of stereo for improving radar detection and recognition. Experiments are reported which confirm and extend the earlier reported results. An example of t... View full abstract»

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  • On a satellite coverage problem

    Publication Year: 1995, Page(s):891 - 896
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    The Earth coverage area for a satellite in an Earth synchronous orbit with a non-zero inclination angle is a function of the time of day. Locating the area where an Earth terminal can establish a link with a geosynchronous satellite at a certain period of the day is of great concern to system designers. A special case of much interest is when the time period of satellite coverage is 24 h. Two simp... View full abstract»

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  • Computer simulation of IGBT losses in PFC circuits

    Publication Year: 1995, Page(s):1167 - 1173
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    An analysis is presented that forms the basis for an algorithm for calculating the IGBT losses in a power factor correction (PFC) circuit. The method employs experimental data from an off-line test circuit that closely resembles the switching conditions in the actual PFC. This technique provides calculated values of both the conduction and switching losses of the main transistor in a boost-type PF... View full abstract»

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  • Noise subspace techniques in non-gaussian noise using cumulants

    Publication Year: 1995, Page(s):1009 - 1018
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (852 KB)

    We consider noise subspace methods for narrowband direction-of-arrival or harmonic retrieval in colored linear non-gaussian noise of unknown covariance and unknown distribution. The non-gaussian noise covariance is estimated via higher order cumulants and combined with correlation information to solve a generalized eigenvalue problem. The estimated eigenvectors are used in a variety of noise subsp... View full abstract»

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  • Radar detection probabilities and their calculation

    Publication Year: 1995, Page(s):928 - 950
    Cited by:  Papers (52)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1328 KB)

    Most radar targets are complex objects and produce a wide variety of reflections. Different targets often require different models to characterize the varied statistical nature of these responses. Several commonly used statistical models and extensions to them are considered here along with techniques for reliably calculating the resulting probabilities of detection. Marcum (1960) and Swerling (19... View full abstract»

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  • Analysis and design of (LC)(LC)-type series-parallel resonant converter

    Publication Year: 1995, Page(s):1186 - 1193
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    A series-parallel resonant converter employing (LC)(LC)-type tank circuit operating in lagging power factor (PF) mode is presented and analyzed using complex ac circuit analysis. Design curves are obtained and the converter is optimized under certain constraints. Detailed Space Integrated Control Experiment (SPICE) simulation results are presented to evaluate the performance of the designed conver... View full abstract»

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  • A survey of radar ECM and ECCM

    Publication Year: 1995, Page(s):1110 - 1120
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (984 KB)

    Radar electronic countermeasure (ECM) and electronic counter-countermeasures (ECCM) form the principal conflicting pair in modern electronic warfare. The technical history and state of art of both the radar ECM and ECCM are surveyed and their development trends are predicted. The classification of ECCM techniques, compatibility of various ECCM devices in a radar system and effectiveness evaluation... View full abstract»

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  • Ballistic missile track initiation from satellite observations

    Publication Year: 1995, Page(s):1054 - 1071
    Cited by:  Papers (23)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1264 KB)

    An algorithm is presented to initiate tracks of a ballistic missile in the initial exoatmospheric phase, using line of sight (LOS) measurements from one or more moving platforms (typically satellites). The major feature of this problem is the poor target motion observability which results in a very ill-conditioned estimation problem. The Gauss-Newton iterative least squares minimization algorithm ... View full abstract»

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  • A criterion for radar resolution enhancement with Burg algorithm

    Publication Year: 1995, Page(s):897 - 915
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1272 KB)

    A criterion is established for determining the limit on radar resolution enhancement with Burg algorithm (maximum entropy method (MEM)) by comparing the radar range and Doppler resolution limits of MEM with those obtained by the Fourier transform (FT). Also examined are errors in range and Doppler estimation due to MEM and in Doppler space as contiguous pulses are independently extrapolated to for... View full abstract»

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  • Robust range alignment algorithm via Hough transform in an ISAR imaging system

    Publication Year: 1995, Page(s):1173 - 1177
    Cited by:  Papers (36)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    The inverse synthetic aperture radar (ISAR) algorithm for imaging objects moving in a straight line requires range alignment as a preprocessing step since scatterers migrate through the various range bins. The conventional correlation alignment method fails when applied in ground scenarios like an airport due to the clutter environment. A procedure using Hough Transform (HT) alignment is presented... View full abstract»

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  • Rate-aided multisignal time delay detection and tracking

    Publication Year: 1995, Page(s):1019 - 1042
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1588 KB)

    Time delay detection and tracking problems have been investigated in previous papers. The approach used is applicable to many problems. In those papers, a first-order Markov process was assumed for the signal parameter (time delay) dynamic model and a constant signal parameter value was assumed within a “block”, or processing unit of time. A performance degradation is incurred when the... View full abstract»

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  • Perforated-plate magnetics. II. Mode-2 inductor/transformer

    Publication Year: 1995, Page(s):977 - 986
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    As the Mode-1 perforated-plate matrix transformer/inductor (M1PPMT), the Mode-2 perforated-plate matrix inductor/transformer (M2PPMI) is attractive for the construction of low-profile inductors and transformers for switched-mode power converters. Finite-element simulation suggests that the M2PPMI may be approximated as weakly coupled “U-cores”. Conventional inductance formulae for U-co... View full abstract»

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  • Multiple scan joint probabilistic data association

    Publication Year: 1995, Page(s):1204 - 1210
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    This paper presents a multiple scan or n-scan-back joint probabilistic data association (JPDA) algorithm which addresses the problem of measurement-to-track data association in a multiple target and clutter environment. The standard single scan JPDA algorithm updates a track with weighted sum of the measurements which could have reasonably originated from the target in track. The only information ... View full abstract»

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  • Airborne clutter performance of randomized radar waveforms

    Publication Year: 1995, Page(s):951 - 959
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (748 KB)

    The performance of randomized and conventional waveform for airborne radars in cluttered environments is compared. We compute the clutter effects on randomized waveform by direct integration of the cross-ambiguity function with the unfolded clutter density function. It is concluded that, when available system resources are equalized, randomized waveform cannot compete with conventional waveforms i... View full abstract»

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  • Improving performance in pulse radar detection using neural networks

    Publication Year: 1995, Page(s):1193 - 1198
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    A new approach using a multilayered feed forward neural network for pulse compression is presented. The 13 element Barker code was used as the signal code. In training this network, the extended Kalman filtering (EKF)-based learning algorithm which has faster convergence speed than the conventional backpropagation (BP) algorithm was used. This approach has yielded output peak signal to sidelobe ra... View full abstract»

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  • Radar ECCMs new area: anti-stealth and anti-ARM

    Publication Year: 1995, Page(s):1120 - 1127
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (732 KB)

    Stealth air vehicles and antiradar missiles (ARMs) have become serious growing threats to military radars, which therefore must extend the capability of the radar to cover anti-stealth and anti-ARM. As a background to look into the new area of radar electronic counter-countermeasure (ECCM), a concise description of stealth techniques of aircraft and the state of the art of ARM are given. A series ... View full abstract»

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  • Optimal m-ary data fusion with distributed sensors

    Publication Year: 1995, Page(s):1150 - 1152
    Cited by:  Papers (17)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    An optimal data fusion rule is derived for an m-ary detection problem. Each detector determines a local decision using a local decision rule and transmits the local decision to the fusion center. Considering the reliability of local detectors, local decisions are combined to produce the final decision. In this study, based upon the maximum posterior probability concept, optimal decision rules for ... View full abstract»

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  • On deflection as a performance criterion in detection

    Publication Year: 1995, Page(s):1072 - 1081
    Cited by:  Papers (83)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (708 KB)

    The performance of detection systems is usually characterized by the receiver operating characteristics (ROC) curves. Because of the complexity of the calculation of such curves simpler performance criteria are useful. Among these, the deflection criterion, or output signal-to-noise ratio, is one of the most interesting. The advantages and limitations of the deflection are first analyzed. Attentio... View full abstract»

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Aims & Scope

IEEE Transactions on Aerospace and Electronic Systems focuses on the organization, design, development, integration, and operation of complex systems for space, air, ocean, or ground environment.  These systems include, but are not limited to, navigation, avionics, spacecraft, aerospace power, radar, sonar, telemetry, defense, transportation, automated testing, and command and control. 

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Lance Kaplan
Army Research Laboratory